https://devzone.nordicsemi.com/f/nordic-q-a/26602/change-static-passkey-after-1st-bondingIn my application,the end product is given to the user with a static passkey. We need to give the user the provision to change the passkey . Currently I have a working code with static passkey. I can bond to my device with the default password &quot;123456en-USTelligent Community 13Mon, 06 Nov 2017 14:08:23 GMThttps://devzone.nordicsemi.com/thread/104635?ContentTypeID=1Mon, 06 Nov 2017 14:08:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bbdbc7c4-d8c0-4676-988a-df1a3e2d7f58Hung Bui<p>Hi Arun,</p> <p>You would need to define your own protocol to receive the new passkey via BLE. It could be as simply as a write command. Then when you receive the command you call sd_ble_opt_set() to change the passkey.</p> <p>Note that after you bond, the next time the 2 device connect again, it won&#39;t need passkey anymore because they will automaticaly reuse the stored LTK.</p><div style="clear:both;"></div>